What is the gas produced in the reaction: $KO_2 + CO_2 \to ?$

Given below are two statements:
Statement $I$: Lithium and Magnesium do not form superoxide.
Statement $II$: The ionic radius of $Li^{+}$ is larger than the ionic radius of $Mg^{2+}$.
In the light of the above statements,choose the most appropriate answer from the options given below:

$NaOH$ can be transported in the container made up of ?

The strongest reducing agent among the following is:

The hydration energy of $Mg^{2+}$ is larger than that of

In which of the following reactions is hydrogen gas not liberated?